May 2014
Intermediate to advanced
888 pages
23h 16m
English
book
The x86 Microprocessors: 8086 to Pentium, Multicores, Atom and the 8051 Microcontroller, 2nd Edition
by Lyla B. Das
Content preview from The x86 Microprocessors: 8086 to Pentium, Multicores, Atom and the 8051 Microcontroller, 2nd Edition
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11
Peripheral Interfacing—III
IN THIS CHAPTER, YOU WILL LEARN
- The principles involved in serial communications.
- The terminology and standards of serial communications.
- RS-232 pins and connections.
- The use of the USART 8251 as an interface to computers.
- The modes and programming of 8251.
- The concept of direct memory access.
- The necessity and functions of a DMA controller in a computer system.
- Different types and modes of DMA.
- How to use the DMA controller IC 8237.
11.1 | Serial Communication Principles
Transferring data is what we mean when we use the word ‘communication’. Data is to be sent from the source to the destination, and it is necessary for the source and destination formats to be similar for compatibility between them ...
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